Say Uncle

This group of 50-somethings stood on the corner of 30th and 8th, sheets of paper in their hands, heads darting around in all directions.

One gentleman points to the paper, "It says it's on 31st and 8th!"

His wife says, "Well, where the heck is it then?"

Guy says, "I dunno. It should be here."

I say, "Need help?"

"Yeah. We're looking for the Greek place on 31st and 8th."

I point, "Uncle Nicks. Right there on 31st and 8th."

Lady says, incredulously, "How did you know that?"

"Well, this is 30th and 8th and the next block up is 31st and 8th. So it just makes sense." 

Which it does, if you can count.